 Cécille occupied much of the time of his officers and crew in making accurate charts of the harbours, first of all of Akaroa and then of Port Cooper (which he named Tokolabo) and Port Levy.At Port Cooper he established an observatory on shore in the bay just inside the heads, now called Little Port Cooper, but for which his name was ‘Waita’.Little Port Cooper was used as an anchorage by most of the French ships working from Port Cooper in 1838 and in subsequent years, and it was apparently there that Langlois anchored when the "Cachalot" came into harbour in July 1838.